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It is calculated, according to the Mayan calendar, that each epoch or "Sun" described in the Popul Vuh lasts one Tzolkin, or 13 Katun. Thus, the date -3114 (YP) corresponds in the Mayan cosmological narrative to the world-flood that destroyed the "wooden monkies" and gave birth to the modern "corn people." Likewise, the date +2012 (YP) will mark the end of the "corn people's" "Water Sun" and usher in the "Fifth Sun" on Dec. 21.